Music-leaf turner.



No. 66l,79l. Patented Nov. l3, I900. F. J. CHRIST.

MUSIC LEAF TURNER.

(Applicaticm filed Sept. 16 1899"! 2 SheetsSheet I.

(No Model.)

Patented Nov. l3, I900. F. J. CHRIST.

MUSI C LEAF TURNER.

(Application filed Sept. 16, 1899.

2 Sheets-Sheet 2-.

[29% .LIJJ'Q b a f H w 6 d [WI & in

M. WAN

award UNITED STATES PATENT OFFICE.

FRANZ JOSEF CHRIST, OF BERLIN, GERMANY.

.MUSICI-LEAF TURNER.

SPECIFICATION forming part of Letters Patent No. 661,791, dated November 18, 1900.

' Application tiled September 16, 1899. Jenni No. 730,714. \No model.)

To all whom it may concern:

is it known that I, FRANZ J OSEF CHRIST,

mechanician, a subject of the Emperorof Germany, residing at Fiirhringerstrasse 35, Berlin, in the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Leaf-Turners for Sheet- Musicand the Like, of which the following is a full, clear, and exact description.

The subject of the present invention is a leaf-turner by which the leaves of sheet-music or tbe'like may be turned singly by means of mechanically-actuated wire hoops placed behind the leaves.

In the accompanying drawings the leafturner is illustrated with four hoops.

Figure 1 shows a front view of the device with the hoops placed behind the single leaves and ready for operation. Fig. 2 is a vertical cross-section on the line A B,' Fig. 1. Fig. 3; is a view from below of the center part of the device. Fig'. 4- is a cross-section on the line C D, Fig. 1. Fig. 5 is a rear view of the plate carrying the unlocking mechanism for the hoops.

A shaft or is mounted on one of two strips of wood W W,.connected together by means of a hinge w and forming the lower part of a sheet-m usic support. The disks b are rotatable on said shaft. These disks carry arms 0, to which are connected the hoops d, made of wire or similar material. Spring-blades e are fastened to the arms 0, projecting from the free ends of the same and provided with blocks j, which are beveled, as shown in Fig. 4. These blocks f may be. locked behind noses g, fixed at suitable distances on a plate h, which is countersunk into the wooden frame W. These noses y are also wedgeshaped or beveled, as clearly seen in Fig. 4. The blocks f on the springs e on account of the elasticity of thelatter catch behind the nosesg of plate It and are held in this position until released. The cam-disks b on shaft 0. are separated by interposed circn'lar washers i and are out off or provided with recesses k on the side opposite to the levers c, as clearly shown in Fig. l and in dotted lines in Fig. 3. Springs l, engaging into these recesses k and pressing against one of their edges, cause the turning of the respective disksb, carrying the arms 0 and oops (1, one hundred and eighty degrees as soon as the blocks f a re released and' after this operation retain the disks b and arms 0 and hoops d in their new position'i. e., with the hoops and the leaves turned over-by pressing against the upper (Shown in Fig. 3.)- An-.

edge of recess it.

other function of springs l is to pressthef blocks f against the rear face of the noses g.

To permit rotation of the disks 6, the blocks f must first be released. This is accomplished;

s, Fig. 5, having teeth into whi'chfengagea pawl 'r and a springdetent it. 'i IThe, p wl) is pivoted to a lever n and held by a springer in engagement with the'ratchet wheel s; "The lever 12. turns on a pin'yon the oifside of 't l ieu plate h and is pressed by a spring t, so as to tend to rotate the ratchet-wheel s'. The spring u, also located on the off sideof plate h, holds the ratchet-wheel s, and therefore also the star-wheel m, against backward rotation.

The change of position is accomplished as follows: On the front side of plate h there is provided a second lever q, rotatable on the pin y, which lever q is connected to the other levern by means of a pimp, extending through a slot 0 in the, plate h, andtherefore transmits its motion to the same. The free end of lever q is connected to a slide 1:, which has a notch for a pin g at the end of the lever q, as shown i n dotted lines in Fig. 1. This slide'v mov s on the front side of plate h and is con fined and guided by a fixed stud z, and the parts g of plate It, and a guide-piece z. The

lower end of said slide '0 is bent at right ans. On-releasiug the slide '0 the springt will push this slide, as well as the two lovers (1 and 1', in anupward directionuntil the lever q strikes the pins, and the clutch 'r will turn the respective HNISlC'lEtH'CS.

the cam-wheel s and also the star-wheel m ninety degrees, in which position it will be locked against backward rotation by the spring 11. One of the teeth m m m m 5 strikes against one of the spring-blocks f and presses the same away from the corresponding nose 1} of the plate It, so that the action of the spring! will turn one of the disksb and its lever a and one of the hoops (I, carrying The operation of the disks h 0 starts with the lower one, as the teeth m. 'm m." m are of such dilleront length as to operate successively upon the different blocks j".

The following is what [claim as new and'deleaves; detont-springs e on said levers, noses g with which the delcnt-springs engage when the levers are turned to normal position, a star-wheel m, engaging successively with the springs e todisc-harge them from their retainlug-noses g, nians fol-imparting step-by-step rotation to'the star-\\'hecland springs t to effect the rotation of the levers when the lat.-

ter are released, substantially as described.

2. The combination of the levers e fulcrtuned on a common shaft, leaf-turningarms (I carried thereby, dctaining-springs e on the levels carrying beveled blocks 1'. noses g) with which'the blocks] engage, a star-wheel m having teeth of unequal length to engage suecessively with the blocks f and discharge the same by rotation of the star-wheel, means for step rotation to the star-wheel substantially.

noses g with which the blocks engage, the starwheel m having teeth m, m, m", m of successivel y greater length adapted to discharge the blocksfsuccessively from the noses y when the star-wheel is rotated, the lever-n,' pawl 1' spring I ratchet-wheel sand a slide 1. suitably sq connected to the lever n to impart movement thereto and thereby impart stop-hy-step rotation to the star-wheel, and suitable springs [acting on the hubs of the level-sand tnrn ing said levers' when they are released. 5 5

-t. In combination with levers e, leaf-t-urn ing arms (l carried thoreby,detaining-springs r and bloeksj'on the levers, noses g with avh ich they are engaged, and suitable springs for turning the lovers when released; thtlstarwheel 114, having teeth of unequal length and slide 1' connected levers it q; springs t, u, pawl 1 r and mtchet-wheel s for imparting stelhbyas described. r In witness whereol'. I subscribe my signa-. ture in presence of two-witnesses. v I 

